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Location:
South Australia
Registered:
July 2002
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EFI Design - 4cyl GE L-Jetronic (I suck!)
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Wed, 13 October 2004 10:52
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Well, I'm still in the process of building up the 2.2L 3S-GE (using a 5S-FE crank) - I have decided (against my budgeting plans) to go with a custom intake system, and a custom efi system.
I'm currently trying to sort out if I can use some kind of open-source ECU like the MS (as it's the cheapest option) however although I am not ignorant of electronics, I am NO genius when it comes to PCBs, transistors, diodes, circuit diagrams etc etc and it seems like in order to make a MegaSquirt control both fuel and spark delivery might be painful...the other option is some kind of MS derivative...the GenBoard or something?
I was under the impression that although AFM is less 'precise' than MAP, it is more 'accurate' for measuring air flow (remembering the difference between precision of measurement, and accuracy of measurement). AFM is also less responsive than a MAP, apparently, however I do want the engine to be able to run for many thousands of kilometres and thus wear etc etc may become an issue?
Plus if I include EGR (see below) the MAP becomes less precise (as the pressure reading will include some very low O2 content air) unless you include a wideband oxy sensor in the intake tract as well ($$$). Whereas with an AFM, I'll always measure the amount of 'normal' air coming in (thus not being affected by EGR)
Why am I bitching about this? Genboard and MegaSquirt have on-board MAP...*strokes beard* not so cool...
I'm going to run a distributorless ignition, so as to avoid having the distributor punch a hole in the firewall of my TA-23 (the 3S-GE head can be a bit painful to fit when N-S). Using two coil packs and sparking at every revolution.
Here's my short list of things I'll need. Some of which I may already have handy, some not.
- Custom intake manifold
- ST162 Air Flow Meter
- 4 x standard ST162 injectors
- ST162 fuel rail
- 2 x ignition coil packs
- intake air temperature sensor
- water temperature sensor
- exhaust lambda (oxygen) sensor
- idle speed control valve
- throttle position sensor
- cold start injector
- cold start sensor (?)
- some kind of ECU for all this stuff!!!
Here's the stuff I may also want
- Knock Sensor
- Brake Sensor
- EGR (need legal emissions!) + EGR temp sensor
So - question - what ECU options have I got? I don't mind dicking around with an open-source one, I'm a very competent assembly language programmer, but does anyone have any experience or suggestions to add to the list of bits I'll need?
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| | Subject | Poster | Date |
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EFI Design - 4cyl GE L-Jetronic (I suck!)
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RWDboy | Wed, 13 October 2004 10:52 |
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Re: EFI Design - 4cyl GE L-Jetronic (I suck!)
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ViPeR_NiPPleX | Wed, 13 October 2004 10:59 |
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Re: EFI Design - 4cyl GE L-Jetronic (I suck!)
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thechuckster | Wed, 13 October 2004 11:09 |
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Re: EFI Design - 4cyl GE L-Jetronic (I suck!)
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RWDboy | Wed, 13 October 2004 12:21 |
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Re: EFI Design - 4cyl GE L-Jetronic (I suck!)
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oldcorollas | Wed, 13 October 2004 12:36 |
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Re: EFI Design - 4cyl GE L-Jetronic (I suck!)
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RWDboy | Wed, 13 October 2004 12:58 |
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Re: EFI Design - 4cyl GE L-Jetronic (I suck!)
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oldcorollas | Wed, 13 October 2004 13:13 |
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Re: EFI Design - 4cyl GE L-Jetronic (I suck!)
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RWDboy | Wed, 13 October 2004 13:05 |
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Re: EFI Design - 4cyl GE L-Jetronic (I suck!)
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thechuckster | Wed, 13 October 2004 13:24 |
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Re: EFI Design - 4cyl GE L-Jetronic (I suck!)
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RWDboy | Wed, 13 October 2004 13:25 |
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Re: EFI Design - 4cyl GE L-Jetronic (I suck!)
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RWDboy | Wed, 13 October 2004 13:30 |
